What would be the state of the art image captioning deep learning model?
Here are a couple of Kaggle Kernels, Notebooks and Tutorials for Image Captioning.

Kaggle Kernel | Neural Image Captioning:  -&gt; 

Kaggle Kernel | Show Attend and Tell

Kaggle Kernel | Flickr Image Captioning : TPU, TF2 &amp; Glove

Tensorflow Tutorial | Image captioning with visual attention

Show and Tell: A Neural Image Caption Generator by Vinyals et al.